Improvement in water-grate bars



1 1 303 7 'mm MAR 28,1871,-

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' UNITED STATES PATENT OEEICE.

TWILLIAM H. FARI'tIS, OF CAIRO, ILLINOIS.

IMPROVEMENT IN WATER-GRATE BARS. y

Specification forniing partoi Leiters Patent No. 513,037, dated March 2B, 1871.

To all whom t may concern.-

Be it known that I, Captain WILLIAM H.

vIARRIS, of Cairo, in the county of Alexanderv :unl State of Illinois, have invented a new and useful Improvement in GrateBars; and I do hereby dcclare-thatthe following is a full, vicar, and exact deseriptionfthereoi', which illenable others skilled in the art to make and use the same, reference being had to` the accompanying drawing 'forming part of this specification, in which* Figure l is a perspective View of one of my improved gratebars, with its tittings and connections.

Figure2 is a detail perspective view of the stiifener. p

Figure 3 is a detail sectional view taken through the linea tig. 1.

Similar letters of reference indicate corresponding parts.

Hy invention has for its object to furnish an improved grate-har for the furnaces of steamboilers, which shall be so constructed as to allow water to'cireulate through it and the boiler to protect the bars from the intense heat of the fire, and to assist in heating the water and generating steam; and l It consists in the construction and combination of various'parts, as hereinafter more fully described.

A is the gratebar,wheh is made tubular in forni to allow'water to circulate through it.

The forward end of the bar A enters a countersunk seatin the inner sideo'f the head B.

C is a pipe,vwhich passes through the side wall of the furnace, and to theouter end of which is attached an elbow, D, from which a pipe egrtends to the lowest part of the boiler, to receive water from the boiler and conduct it to the hollow grate-bar A. y

-The inner end of the pipe D is connected -With an opening in the side of the head B,

which opening communicates with the gratebar A.

Uponthe 'other side of the head Bis formed va similar opening, to be connected with the opening inthe sideof the head ofthe adjacent bar, and so on through all the bars of the grat-e.

The connections at the forward ends of the bars A are secured-and held in place by a rod,

E, extending through them and through the pipe C, and having a head upon one end and a nut upon its other end.

The other or rear end of the hollow gratebar A enters a countersunk seatin the forward side of the lower end of the back bar F which extends up vertically or with a slight rearward inclination, and which', in connection with the back bars of the other grate-bars, forms the back wall of the fire-chamber.

The grate-bar A is secured in placein connection with the head, B and back bar F, by a bar, G, which passes longitudinally through the grate-bar A, and through the head Band lower end of the back bar F.

The part of the bar G that passes through the grate-bar A ismade thin, and of such a breadth as to fit into the interior of the grate. bar A, where it is arranged vertically, as shown in iig. 3, to serve as a stiii'ener to said gratebar, to resist the tendency of thebar Ato be sprung or warped by the heat.

H is a pipe, which passes through the side wall of the furnace, and has an elbow, I, attached toits outer end to receive the en-d of the pipe that connects it with the upper part ofthe boiler. f

The inner end of the pipe H is connected with an opening in the side of the back bar F, a similar opening being formed in the other -side of the upper end ot the said back bar F, to adapt it to be connected with the npper'end of the backbar of the adjacent gratebar.

The connections atthe upper ends of the back bars F are securedby a rod, J, in the same manner as the connections at the forward end of the gratebars A are secured by the rod E. p

In case it is desired to have the forward ends of the grate-bars A free or unconnected with each other, the heads B may be made i solid, and the pipe C and. elbow D may be connected with the lower part of the back bars F, in the same manner as they havebeen described as being connected with the heads B.

These connections or fittings are all made alike, so that they will iit accurately however they may be connected.

The connections exposed te the heat of the fire are made with gasket-joints, as less liable to be injured by the intense heat to which they are exposed. f

In case the grate-bars A should be warped .I

2 names? or sprung by the heat, b y-loosening Vthe nut-s upon the stiener G the bar A may be turned to expose another part of the re.

Having thus'described my invention,

I claim as new and desire to'secure by Let'- ters Patent-4 i 1. The hollow upright back bars F, in combination with thehollow grntebars A, sub stantially as herein shown and described, and for the purpose set forth.l

2. The sti'ener G, constructed as' herein shown and described, in combination With'the tubular grate-bars A, substantially as herein shown and described, and for the purpose set forth. Y

3. The combination ofthe elbow I, pipe H, back'bar F, rod J, tubular grate-bar A, stii ener G, head B, pipe C, and elbow D, Wlth each other, and whether the pipeV C be connectedwith the head B or back bar F, substam tially ae herein shown and described, and for the purpose set' forth.

CAPT. WM. H. HARRIS.

VVitnesees:

JAS. B. FULTON, W, H. MORRIS. 

